/Engine/Source/Editor/AnimGraph/Public/AnimGraphNode_BoneDrivenController.h
Gives each visual node a chance to do final validation before it's node is harvested for use at runtime.
virtual void ValidateAnimNodeDuringCompilation ( [USkeleton](API\Runtime\Engine\Animation\USkeleton) * ForSkeleton, [FCompilerResultsLog](API\Editor\UnrealEd\Kismet2\FCompilerResultsLog) & MessageLog )